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001 /* Copyright (C) 2004 The KOS Team 001 /* Copyright (C) 2004 The KOS Team 002 Copyright (C) 1999 Free Software Foundatio 002 Copyright (C) 1999 Free Software Foundation, Inc. 003 003 004 This program is free software; you can redi 004 This program is free software; you can redistribute it and/or 005 modify it under the terms of the GNU Genera 005 modify it under the terms of the GNU General Public License 006 as published by the Free Software Foundatio 006 as published by the Free Software Foundation; either version 2 007 of the License, or (at your option) any lat 007 of the License, or (at your option) any later version. 008 008 009 This program is distributed in the hope tha 009 This program is distributed in the hope that it will be useful, 010 but WITHOUT ANY WARRANTY; without even the 010 but WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 012 GNU General Public License for more details 012 GNU General Public License for more details. 013 013 014 You should have received a copy of the GNU 014 You should have received a copy of the GNU General Public License 015 along with this program; if not, write to t 015 along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place - Suite 3 016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 017 USA. 017 USA. 018 */ 018 */ 019 #define ASM_SOURCE 1 019 #define ASM_SOURCE 1 020 020 021 .file "irq_wrappers.S" 021 .file "irq_wrappers.S" 022 022 023 .text 023 .text 024 024 025 /* The address of the table of handlers (defin 025 /* The address of the table of handlers (defined in irq.c) */ 026 .extern sos_irq_handler_array 026 .extern sos_irq_handler_array 027 027 028 /* The address of the table of wrappers (defin 028 /* The address of the table of wrappers (defined below, and shared 029 with irq.c */ 029 with irq.c */ 030 .globl sos_irq_wrapper_array 030 .globl sos_irq_wrapper_array 031 031 032 032 033 /* These pre-handlers are for IRQ (Master PIC) 033 /* These pre-handlers are for IRQ (Master PIC) */ 034 .irp id, 0,1,2,3,4,5,6,7 034 .irp id, 0,1,2,3,4,5,6,7 035 035 036 .p2align 2, 0x90 036 .p2align 2, 0x90 037 037 038 sos_irq_wrapper_\id: 038 sos_irq_wrapper_\id: 039 .type sos_irq_wrapper_\id,@function 039 .type sos_irq_wrapper_\id,@function 040 040 041 /* 041 /* 042 * Backup the CPU context 042 * Backup the CPU context 043 */ 043 */ 044 044 045 /* Fake error code */ 045 /* Fake error code */ 046 pushl $0 046 pushl $0 047 047 048 /* Backup the actual context * 048 /* Backup the actual context */ 049 pushl %ebp 049 pushl %ebp 050 movl %esp, %ebp 050 movl %esp, %ebp 051 051 052 pushl %edi 052 pushl %edi 053 pushl %esi 053 pushl %esi 054 pushl %edx 054 pushl %edx 055 pushl %ecx 055 pushl %ecx 056 pushl %ebx 056 pushl %ebx 057 pushl %eax 057 pushl %eax 058 subl $2,%esp 058 subl $2,%esp 059 pushw %ss 059 pushw %ss 060 pushw %ds 060 pushw %ds 061 pushw %es 061 pushw %es 062 pushw %fs 062 pushw %fs 063 pushw %gs 063 pushw %gs 064 064 065 /* Send EOI to PIC. See Intel 065 /* Send EOI to PIC. See Intel 8259 datasheet 066 available on Kos website */ 066 available on Kos website */ 067 movb $0x20, %al 067 movb $0x20, %al 068 outb %al, $0x20 068 outb %al, $0x20 069 069 070 /* 070 /* 071 * Call the handler with IRQ n 071 * Call the handler with IRQ number as argument 072 */ 072 */ 073 pushl $\id 073 pushl $\id 074 leal sos_irq_handler_array,%e 074 leal sos_irq_handler_array,%edi 075 call *\id*4(%edi) 075 call *\id*4(%edi) 076 addl $4, %esp 076 addl $4, %esp 077 077 078 /* Restore the context */ 078 /* Restore the context */ 079 popw %gs 079 popw %gs 080 popw %fs 080 popw %fs 081 popw %es 081 popw %es 082 popw %ds 082 popw %ds 083 popw %ss 083 popw %ss 084 addl $2,%esp 084 addl $2,%esp 085 popl %eax 085 popl %eax 086 popl %ebx 086 popl %ebx 087 popl %ecx 087 popl %ecx 088 popl %edx 088 popl %edx 089 popl %esi 089 popl %esi 090 popl %edi 090 popl %edi 091 popl %ebp 091 popl %ebp 092 092 093 /* Remove fake error code */ 093 /* Remove fake error code */ 094 addl $4, %esp 094 addl $4, %esp 095 095 096 iret 096 iret 097 .endr 097 .endr 098 098 099 099 100 /* These pre-handlers are for IRQ (Slave PIC) 100 /* These pre-handlers are for IRQ (Slave PIC) */ 101 .irp id, 8,9,10,11,12,13,14,15 101 .irp id, 8,9,10,11,12,13,14,15 102 102 103 .p2align 2, 0x90 103 .p2align 2, 0x90 104 104 105 sos_irq_wrapper_\id: 105 sos_irq_wrapper_\id: 106 .type sos_irq_wrapper_\id,@function 106 .type sos_irq_wrapper_\id,@function 107 107 108 /* 108 /* 109 * Backup the CPU context 109 * Backup the CPU context 110 */ 110 */ 111 111 112 /* Fake error code */ 112 /* Fake error code */ 113 pushl $0 113 pushl $0 114 114 115 /* Backup the actual context * 115 /* Backup the actual context */ 116 pushl %ebp 116 pushl %ebp 117 movl %esp, %ebp 117 movl %esp, %ebp 118 118 119 pushl %edi 119 pushl %edi 120 pushl %esi 120 pushl %esi 121 pushl %edx 121 pushl %edx 122 pushl %ecx 122 pushl %ecx 123 pushl %ebx 123 pushl %ebx 124 pushl %eax 124 pushl %eax 125 subl $2,%esp 125 subl $2,%esp 126 pushw %ss 126 pushw %ss 127 pushw %ds 127 pushw %ds 128 pushw %es 128 pushw %es 129 pushw %fs 129 pushw %fs 130 pushw %gs 130 pushw %gs 131 131 132 /* Send EOI to PIC. See Intel 132 /* Send EOI to PIC. See Intel 8259 datasheet 133 available on Kos website */ 133 available on Kos website */ 134 movb $0x20, %al 134 movb $0x20, %al 135 outb %al, $0xa0 135 outb %al, $0xa0 136 outb %al, $0x20 136 outb %al, $0x20 137 137 138 /* 138 /* 139 * Call the handler with IRQ n 139 * Call the handler with IRQ number as argument 140 */ 140 */ 141 pushl $\id 141 pushl $\id 142 leal sos_irq_handler_array,%e 142 leal sos_irq_handler_array,%edi 143 call *\id*4(%edi) 143 call *\id*4(%edi) 144 addl $4, %esp 144 addl $4, %esp 145 145 146 /* Restore the context */ 146 /* Restore the context */ 147 popw %gs 147 popw %gs 148 popw %fs 148 popw %fs 149 popw %es 149 popw %es 150 popw %ds 150 popw %ds 151 popw %ss 151 popw %ss 152 addl $2,%esp 152 addl $2,%esp 153 popl %eax 153 popl %eax 154 popl %ebx 154 popl %ebx 155 popl %ecx 155 popl %ecx 156 popl %edx 156 popl %edx 157 popl %esi 157 popl %esi 158 popl %edi 158 popl %edi 159 popl %ebp 159 popl %ebp 160 160 161 /* Remove fake error code */ 161 /* Remove fake error code */ 162 addl $4, %esp 162 addl $4, %esp 163 163 164 iret 164 iret 165 .endr 165 .endr 166 166 167 /* Build the sos_irq_wrapper_array, shared wit 167 /* Build the sos_irq_wrapper_array, shared with irq.c */ 168 .section ".rodata" 168 .section ".rodata" 169 .p2align 5, 0x0 169 .p2align 5, 0x0 170 sos_irq_wrapper_array: 170 sos_irq_wrapper_array: 171 .irp id, 0,1,2,3,4,5,6,7,8,9,10,11,12, 171 .irp id, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 172 .long (sos_irq_wrapper_\id) 172 .long (sos_irq_wrapper_\id) 173 .endr 173 .endr
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